What, ultimately, did Wolfram do in these five most productive years? Can it be said in a sentence, or a paragraph?

I always find it interesting when someone claims to have something to say, but can't seem to say it at a short enough length to be held entirely in the human mind.

It's like Bob says he has a beautiful sculpture to show me, but when I ask to see it, he sends me truckload after truckload of modeling clay. The sculpture is constituted from this material, Bob tells me.

Okay, I say, but it seems like you're asking me to do an awful lot of work here, and I don't know you enough to be confident that the effort would be well-spent. So could you maybe show me a complete, smaller scale model, with a bit less detail, that gives me the general idea of what's so special and new about what you've made?